Power driven loader



Gfl. ii, 1932. w JAMES 1,882,629

POWER DRIVEN LOADER Filed Feb. 27, 1932 2 Sheets-Sheet 1 Frederic WINVENTOR' ATTORNEY Oct. 11, 1932. F. w. JAMES 1,882,629

POWER DR IVEN LOADER Fild Feb. 27. 1952 2 Sheets-Sheet 2 i" ii W 5!Fredefl c W.Jam

INVENTOR i1; ATTORNEY Patented Oct. 11, 1932 UNITED STATES FREDERIC W.JAMES, OF BELLEVILLE, -NEW PATENT OFFICE JERSEY, ASSIGNOR TO N. P.NELSON m! 1 p WORKS, INCL, 0F PASSAIC, NEW JERSEY, A CORPORATION OF NEWJERSEY POWEB' DRIVEN LOADER Application filed February 27, 1932. SerialNo. 595,470.

This invention relates to a. power driven loader embodying in itsconstruction an endless bucket elevator, spiral feeding device andscraper attachment, and the invention has for its object to provide.certain improvements in the scraper attachment. A loading apparatus ofthe character hereinafter described is one which is particularly welladapted to handle gravel, sand and loose dirt, and the problem whichpresents itself in this class of work, is one involving an efficientarrangement and manipulation of the scraper attachment disposed directlybehind the spiral feeder and conveyor.

7 The problem has been elfectively solved in the present inventionwhich, briefly stated comprises a scraping shield suspended onadjustable pivot points carried on a pivotally supported elevator boom,and a set of tracks rigidly supported on the frame of the tractoragainst which the shield is supported and guided with respect to therelative position of the elevator boom and spiral feeder.

Loading machines of this character are frequently used in road work forstripping old macadam prior to laying improved pavements, and in suchservice the progress of the loader is frequently halted by overheadelectric wires and similar obstructions, under which the boom must belowered to allow the loader to pass. In existing arrangements theuncoupling of the scraper pushers from the chassis causes additionaldelay, and the neces: sity of coupling them up again before the loadercan resume its operations affords an additional interruption to theprogress of the work.

In the present invention however, the scraper abuts against the chassisbut is not connected to it so that the boom may be lowered Withoutdelay. The tracks receiving the scraper rollers are so profiled that asthe boom is raised again the rollers fall automatically against them,bringing the descendin g shield at once into operative position with agreat saving of time and labor.

As the pressure of material against the scraper is considerable, rollersare employed to reduce the friction between theshield and the abutment.It is obvious that the rollers might be mounted on the chassis and the.

tracks on the shield without departing from. the principles of thepresent invention.

One embodiment of my invention is de-- scribed in the followingspecification, set forth In the appended claims and illustra-.

tively exemplified in the accompanying drawings, in which, Figure 1 is aside elevational view of the feeding end of a loader in workingposition; Figure 2 is anenlarged detail side elevational view of thetrack, shield and adjustable support therefor; Figure 3 is a sideelevational view of the loader intransporting position; and Figure 4 isa perspective view of the feeding end ofthe loader and the scraperattachment.

' Referring to the drawings, 10 denotes a end thereof a foot shaft 16issupportedin rigid brackets 17 projecting forwardly and. beyond theboom 14. The shaft 16 at its midportion carries the sprockets 18 over'which the chains of the bucket elevator 15 are guided. The outerportions of the shaft the sprockets 18 are provided with thesuperstructure and at the feeding,

beyond radial arms 19 su porting the spiral arranged blades.

,20 of the feeding mechanism.

Each arm 17 is an angular rod, carrying a bearing 21 at its outer end toreceive the shaft 16. and being directed inwardly towards its.- other'end where the latter is rigidly attached 'to one side of the boom 14.

Swinging from the sides of the boom 14 adjacent the feeding end thereofis a scraper- 22 comprising a plurality of angle bars 23, each spacedfrom the other and provided with an eye 24 at its upper part adjacenteach end to receive a pin 25 of a crank arm 26, the

latter being fixed on a rock shaft 27 projecting transversely across theboom. Each bar 23 is angular with one arm terminating in the eve 24,while the other arm projects forwardly,

as illustrated in Figure 2. The for- 1 ward sides of the bars 23 supportan angular plate 28 which forms a shield disposed directly in back ofthe spiral feeder blades 20. The lower forward end of the shield 28carries a plurality of spaced upright bolts 29, which are arranged toproject through slots 30 in a scraper blade 31 adjustably carried by theshield, and which are provided with nuts adjustable thereover to clampthe blade 31 firmly to the shield.

The rock shaft 27 is controlled in its move ments by a segmental wormgear 32 fixed on the shaft and in mesh with a worm 33 turning with ahand wheel shaft 34, the latter being journaled in bearing plates 35mounted on the side wall of the boom. The control end of the shaft 34 isdisposed adjacent the operators platform and provided with a hand wheel36.

The back of the scraper 22 is provided with two brackets 37 projectingfrom each of the outside angle bars 23, the brackets being rigidly heldby a bridge piece 38 fixed at its opposite ends to the brackets 37. Thebrackets support a roller shaft 39 which carries a pair of rollers 40,each thereof being disposed to ride over a track 41 arranged at thefront end of the tractor frame. The tracks comprise upper and lowerangle bars 42 fixed at their inner ends to the tractor frame, asillustrated in Figure 2 and adapted to carry upright plates 43 at theirforward ends. Each plate 43 supports a track 41 which is angular, theupper arm being the shorter and projecting at an abrupt upward andrearward inclination, while the lower arm is disposed in a downwardlyand rearwardly inclination.

It will be seen that in operation, the scraper 22 is rigidly supportedat any elevation between the'upper and lower extremities of the tracks41 by contact therewith of therollers 40. In the transporting positionof the loader, as illustrated in Figure 3, the scraper hangs independing position from the pins 25 so that when the boom is lowered,the rollers will engage the upper arms of the tracks and automaticallybring the scraper into operating position with respect to the spiralfeeders 20. The shield plate 28 is cut away at its mid portion toaccommodate the pickup end of the bucket elevator, but its lower edgeserves as a scraper to gather up such loose material as escapes thefeeder and to return it to the spirals.

The present construction is not only extremely simple in design, butexceedingly efficient in operation, because it automatically adjustsitself with any alteration in the working position of the boom and withrespect to the spiral feeding and conveying members. If it becomesnecessary to raise or lower the shield during operation of the loader,the hand wheel 36, shaft 34 and worm 33 are rotated so as to move theworm gear 32 and crank arms 26 and with them the bars 23 and plate 28.

Having now described my invention and the manner in which the sameoperates, what I claim as new and desire to secure by Letters Patent,is: v

1. In a loading device of the character described, a pivoted boom havingan elevatin conveyor with transversely arran ed spira feeders at thepickup end thereo a transversely disposed scraper pivotally supportedfrom the feed end of the boom, and fixed abutments free of the scraperfor limiting the rearward movement of the latter under resistance fromthe material encountered.

2. In a loading device of the character described, a pivoted boom havingan elevatin conveyor and transversely arranged spira l feeders at thefeed end, a transversely disposed scraper pivotally suspended from thefeed end of the boom and behind the feeder, and abutments free of theboom or scraper for limiting the rearward movement of the scraper whenbeing crowded into the material to be loaded.

3. In a loading device for a motor vehicle, a boom pivotally mountedupon the vehicle and carrying an elevating conveyor, transverselyarranged spiral feeders for gathering material and deliverin it intosaid conveyor, a transversely dispose scraper pivotally suspended fromsaid boom behind said feeders, and an abutment fixed on said vehicle inposition to limit the rearward motion of the scraper when crowding intothe material to be loaded.

4. In a loading device for a motor vehicle, a boom pivotally mountedupon the vehicle and carrying an elevating conveyor, transverselydisposed spiral feeders arranged to gather material and to deliver itinto said conveyor, a transversely disposed scraper pivotally suspendedfrom said boom behind said feeders, means for adjusting the elevation ofsaid scraper with respect to said feeders, and an abutment fixed on thevehicle in position to limit the rearward motion of the scraper aboutits pivotal support.

5. A loading device as claimed in claim 4 in which the means foradjusting the elevation of the scraper comprises a worm driven gear, ashaft disposed transversely of the boom, and a crank arm on each end ofthe shaft pivotally supporting the scraper at its upper edge.

6. A loading device as claimed in claim 4. including anti-friction meansbetween said scraper and said abutment.

7. A loading device as claimed in claim 4, in which the abutmentcomprises a profiled track to retain the scraper in operative positionand including a roller supported at each end of the rear of the scraperto come into rolling engagement with said track.

8. A loading device as claimed in claim 4:

in which the means for adjusting the elevation of the scraper comprisesa worm driven gear, a shaft disposed transversely of the boom and drivenby said gear, a crank'arm on each end of the shaft pivotally supportingthe scraper at its upper edge and in which the abutment comprises aprofiled track engaging a roller to prevent backward movement of thepivoted scraper.

9. A loading device of the character de scribed having a chassis, aconveyor boom pivoted on said chassis, and a transversely disposedscraper pivotally supported from the feed end of said boom and abuttingagainst said chassis but not attached thereto.

10. A loading device of the character described having a chassis, aconveyor boom pivotally mounted on said chassis, and a transverselydisposed scraper adjustably and pivotally supported from said boom andabutting against said chassis but not attached thereto.

11. In a loading device of the character described having achassis, apivoted conveyor boom mounted upon said chassis, an adjusting mechanismcarried by said boom adjacent the feed end thereof, and a transverselydisposed scraper pivotally supported from said adjusting mechanism andabutting against said chassis but not attached thereto.

In testimony whereof I afiix my si ature.

FREDERIC W. J S.

